My vehicle has headrests like the prius or CRV, but they don't remove. An Argos fits perfectly (shell against vehicle seat, headrest against headrest, no gaps) ...nothing else I've tried fits without a gap. I ordered an OOBR to try because my child does not have tons of growing room in the Argos, but I like the looks of the Cruiserfix and think it would be more comfortable for my child. Anyone think it is worth a shot or does it not play well with headrests at all?